Radio apparatus



- Sept. 29, 1936.

A. DE SAKHNCFFSKY 2,056,002

RADIO APPARATUS Filed Jan. 29, 1934 /7 E 2/ E z INVENTOR g 'ddwATTORNEYS Patented Sept. 29, 1936 UNITED STATES PATENT OFFICE 1 Claim.

The invention relates to radio apparatus. One of the main objects of theinvention is to provide a novel operating means for control of I suchparts as the tuning, volume or tone. Ac-

5 cording to the present invention, the control operating means is madein the form of a ring or annulus which may be used in differentassociations with other parts of the apparatus and which lends itselfmore readily to a symmetrical 1O arrangement of parts and a morepleasing design of the cabinet or control panel.

A further object of the invention is to provide a radio apparatus inwhich the operating means for one of the controls forms a frame 15 aboutthe speaker opening and thus provides a compact and pleasingarrangement.

The invention further consists in the several features hereinafter setforth and more particularly defined by the claim at the conclusion 20hereof.

In the drawing:

Fig. 1 is a front elevation view of a control operating means embodyingthe invention;

Fig. 2 is a detail sectional view through a por- 25 tion of a radiocabinet with the control operating means shown in vertical section.

Referring to the drawing, the numeral 3 designates the annular controloperating member generally and 4 the dial associated therewith, said 30member 3 having a pointer 5 cooperating with the indications B on thedial. The indications here shown are for wave length, the control beinga tuning control.

As herein shown, the dial 4 is formed or se- 35 cured to an annularsupporting portion i having an inwardly extending annular flange 8 and ashort outwardly extending annular flange 9 seating in an annular guiderecess in the control member 3, these parts being mounted in the 40opening H in the wall [2 of the cabinet for the speaker l3.

For supporting the speaker and the parts 3 and 4 in position, a spiderI4 of metal or other suitable material is secured to the wall of thecabinet by screws I passing through arms l5 (one being shown) and to thespeaker and the inwardly extending flange 8 of the dial support 1 byscrews IS.

The member 3 is adapted to rotate on the dial support and is adapted tohave its rotary movement translated to the tuning condenser bank I! 5through any suitable operating connections. As here shown, the member 3has an annular spur gear l8 secured thereto by screws I9, said gearacting also as a retainer member for holding the member 3 againstendwise movement relative to the support 1. This gear l8 meshes with agear 20 mounted on the control shaft 2| of the condenser bank I1, theratio of the gears I8 and 20 being of any suitable value.

For the volume control, I have shown the control unit 22 disposed in thespeaker opening with its shaft projecting through a support portion 23and having the exteriorly disposed operating knob 24 thereon. Theportion 23 is here shown as an extension of part of the material formingthe dial 4, the control being suitably clamped thereto.

The opening for the speaker may be protected by the screen 25 here shownas secured to the back face of the dial 4.

From the foregoing description, it will be noted 25 that a rotation ofthe member 3 will through the gears I8 and 20 turn the tuning controlshaft 2| so the desired station may be heard.

While the member 3 has been shown as connected to the tuning control, itwill be understood that it may be used as the operating member for othercontrols of the apparatus such as the volume control or the tonecontrol.

I desire it to be understood that this invention is not to be limited toany particular form or arrangement of parts except in so far as suchlimitations are included in the claim.

What I claim as my invention is:

In a radio apparatus, the combination with a cabinet having an openingfor the speaker, of a control operating member surrounding said opening,an annular dial cooperating with said member and disposed withinthesame, and operating means for the volume control within said openingand inside the projected area of said dial.

ALEXIS DE SAKHNOFFSKY.

